dietpi-software: avoid subshell when writing crontab

Author: MichaIng

dietpi/dietpi-software

@@ -6970,7 +6970,7 @@ _EOF_
 			G_EXEC ln -s /opt/FreshRSS/p /var/www/freshrss
 
 			# Create cron job for feed update every 30 minutes if it does not yet exist
-			crontab -u www-data -l 2>/dev/null | grep -q '/opt/FreshRSS/app/actualize_script.php' || ( crontab -u www-data -l 2>/dev/null ; echo '*/30 * * * * php /opt/FreshRSS/app/actualize_script.php' ) | crontab -u www-data -
+			crontab -u www-data -l 2>/dev/null | grep -q '/opt/FreshRSS/app/actualize_script.php' || { crontab -u www-data -l 2>/dev/null ; echo '*/30 * * * * php /opt/FreshRSS/app/actualize_script.php'; } | crontab -u www-data -
 		fi
 
 		if To_Install 28 # TigerVNC Server